# Vaillant 0020266328: The Same Cooling Plug, Without the Box

URL: https://www.vheatc.site/vaillant-0020266328
Canonical-URL: https://www.vheatc.site/vaillant-0020266328
Updated: 2026-10-20
Language: en-GB

Vaillant 0020266328 is the same cooling plug as the boxed 0020269259, supplied in a Vaillant small-parts bag. What it is, what it does and why it costs less.

Vaillant 0020266328 is the same cooling coding plug as the boxed 0020269259
("Coding plug, cooling function"), supplied in a Vaillant small-parts bag.

- Same blue plug, connector and internal stamping as 0020269259 (Verified Dual-MPN).
- Unlocks cooling on aroTHERM Plus VWL 35/6 to 125/6 supplied without it.
- Costs a fraction of the boxed 0020269259 — you skip the box and label.
- An installer still enables cooling in the installer menu.

Buy on eBay (seller boarder895) — the same plug in two packs:
- 0020266328 (Vaillant small-parts bag, labelled with the part number): https://www.vheatc.site/go/ebay/0020266328
- 0020269259 (Original Vaillant box, labelled “Coding plug, cooling function”): https://www.vheatc.site/go/ebay/0020269259